Mercurial > octave
view scripts/image/cool.m @ 32653:8dfe116fb0fe
maint: Remove unnecessary BIST test for interpreter in cset 475939906cbb.
Remove unnecessary BIST test of number of inputs which doesn't test m-file, but
rather the interpreter.
* autumn.m, bone.m, colorcube.m, cool.m, copper.m, cubehelix.m, flag.m, gray.m,
hot.m, hsv.m, jet.m, lines.m, ocean.m, pink.m, prism.m, rainbow.m, spring.m,
summer.m, turbo.m, viridis.m, white.m, winter.m:
Remove '%!error <function called with too many inputs>' BIST test.
author | Rik <rik@octave.org> |
---|---|
date | Tue, 26 Dec 2023 13:06:35 -0800 |
parents | dfb9b770ae77 |
children | d8e5e55c3cf5 |
line wrap: on
line source
######################################################################## ## ## Copyright (C) 1999-2024 The Octave Project Developers ## ## See the file COPYRIGHT.md in the top-level directory of this ## distribution or <https://octave.org/copyright/>. ## ## This file is part of Octave. ## ## Octave is free software: you can redistribute it and/or modify it ## under the terms of the GNU General Public License as published by ## the Free Software Foundation, either version 3 of the License, or ## (at your option) any later version. ## ## Octave is distributed in the hope that it will be useful, but ## WITHOUT ANY WARRANTY; without even the implied warranty of ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ## GNU General Public License for more details. ## ## You should have received a copy of the GNU General Public License ## along with Octave; see the file COPYING. If not, see ## <https://www.gnu.org/licenses/>. ## ######################################################################## ## -*- texinfo -*- ## @deftypefn {} {@var{map} =} cool () ## @deftypefnx {} {@var{map} =} cool (@var{n}) ## Create color colormap. The colormap varies from cyan to magenta. ## ## The argument @var{n} must be a scalar. ## If @var{n} is not specified the length of the current colormap is used. If ## there is no current colormap the default value of 256 is used. ## @seealso{colormap} ## @end deftypefn function map = cool (n) if (nargin == 1) if (! isscalar (n)) error ("cool: N must be a scalar"); endif n = double (n); else hf = get (0, "currentfigure"); if (! isempty (hf)) n = rows (get (hf, "colormap")); else n = 256; endif endif if (n == 1) map = [0, 1, 1]; elseif (n > 1) r = [0:(n-1)]' / (n - 1); g = 1 - r; b = ones (n, 1); map = [r, g, b]; else map = zeros (0, 3); endif endfunction %!demo %! ## Show the 'cool' colormap profile and as an image %! cmap = cool (256); %! subplot (2, 1, 1); %! rgbplot (cmap, "composite"); %! subplot (2, 1, 2); %! rgbplot (cmap); %!assert (size (cool ()), [256, 3]) %!assert (size (cool (16)), [16, 3]) %!assert (cool (1), [0, 1, 1]) %!assert (cool (true), double ([0, 1, 1])) %!assert (cool (char (1)), double ([0, 1, 1])) %!assert (cool (int32 (1)), double ([0, 1, 1])) %!assert (cool (0), zeros (0, 3)) %!assert (cool (-1), zeros (0, 3)) %!assert (cool (11), [[0:0.1:1]; [1:-0.1:0]; ones(1,11)]', eps) ## Input validation %!error <N must be a scalar> cool ("foo") %!error <N must be a scalar> cool ([1, 2, 3]) %!error <N must be a scalar> cool ({1, 2, 3})